• Go

var t T
tType := reflect.TypeOf(t)
n := tType.Size()

• Ada

N : Integer := (T'Size + 7) / 8;

• C

n = sizeof (t);

• C++

std::size_t n = sizeof(t);

• C#

int n = Marshal.SizeOf(t);

• C#

int n;
unsafe
{
    n = sizeof(T);
}

• C#

int n = sizeof(T);

• D

auto n = T.sizeof;

• Fortran

n = c_sizeof(i)

• Java

String className = t.getClass().getSimpleName();
int n = 0;
if (className.equals("Byte")) {
	n = 1;
} else if (className.equals("Short")) {
	n = 2;
} else if (className.equals("Integer")) {
	n = 4;
} else if (className.equals("Long")) {
	n = 8;
} else if (className.equals("Float")) {
	n = 4;
} else if (className.equals("Double")) {
	n = 8;
} else if (className.equals("Boolean")) {
	n = 0;
} else if (className.equals("Character")) {
	n = 2;
}

• Pascal

n := SizeOf(T);

• Perl

use Devel::Size qw(total_size);
my $n = total_size $t;

• Python

n = pympler.asizeof.asizeof(t)

• Ruby

n = ObjectSpace.memsize_of(t)

• Rust

let n = std::mem::size_of::<T>();